Vulnerability · Published May 14, 2026 · Assigned by mitre
CVE-2026-46419
High 7.5
In plain English
A high-severity security flaw in webauthn-server-core from Yubico. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.3%top 76.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Yubico webauthn-server-core (aka java-webauthn-server) 2.8.0 before 2.8.2 incorrectly checks a function's return value in the second factor flow, leading to impersonation.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Yubico | webauthn-server-core | 2.8.0 – before 2.8.2 |
Weakness: CWE-253 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H